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Top Forums Shell Programming and Scripting perl as lanuage of shells in unix Post 30415 by auswipe on Tuesday 22nd of October 2002 12:31:24 AM
Old 10-22-2002
Re: perl as lanuage of shells in unix

Quote:
Originally posted by yls177
hi, do shells in unix understand the language of perl?
No. Perl understands Perl.

You will see in many perl scripts that the first line of code is often something along the lines of :

Code:
#!/usr/bin/perl

This tells the shell script to use the perl parser for the perl script.

Quote:
Originally posted by yls177

learning perl will make u a ultimate shell programmer?
thanks
No. While Perl does contain a lot of similiarities to shell scripting, it is in it's own little world. If you want to be an ultimate shell scripter, then you should pick a popular shells such as Korn Shell (ksh) (heartily endorsed by Perderabo) or Bourne Again Shell (bash) and have at it. There are many reference guides on the net to shell scripting.
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list. Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1). FILES
/etc/shells list of shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.11 20 Nov 2007 shells(4)
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